[1] Southwestern Univ Finance & Econ, Inst Chinese Financial Studies, Chengdu, Sichuan, Peoples R China
[2] Collaborat Innovat Ctr Financial Secur, Chengdu, Sichuan, Peoples R China
[3] Nanjing Audit Univ, Sch Finance, West Yushan Rd 86, Nanjing 211815, Jiangsu, Peoples R China